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Function
Pyruvate-ferredoxin oxidoreductase (PFOR) is an enzyme of the fermentation cycle which catalyzes the oxidative decarboxylation of pyruvate to acetyl CoA and CO2. This reaction provides the electron source for the reduction of ferredoxin[1]. The reaction is CoA-dependent and contains thiamine diphosphate (TDP). PFOR contains iron-sulfur clusters (Fe4S4).
Structural highlights
The active site of PFOR contains thiamine diphosphate and pyruvate[2]. Mg coordination site. Water molecules are shown as red spheres. Fe4S4 cluster interactions. Each Fe atom interacts with S atom from cysteine.
- ↑ Furdui C, Ragsdale SW. The role of pyruvate ferredoxin oxidoreductase in pyruvate synthesis during autotrophic growth by the Wood-Ljungdahl pathway. J Biol Chem. 2000 Sep 15;275(37):28494-9. PMID:10878009 doi:https://dx.doi.org/10.1074/jbc.M003291200
- ↑ Cavazza C, Contreras-Martel C, Pieulle L, Chabriere E, Hatchikian EC, Fontecilla-Camps JC. Flexibility of thiamine diphosphate revealed by kinetic crystallographic studies of the reaction of pyruvate-ferredoxin oxidoreductase with pyruvate. Structure. 2006 Feb;14(2):217-24. PMID:16472741 doi:10.1016/j.str.2005.10.013
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3D structures of pyruvate-ferredoxin oxidoreductase
04-October-2023
1b0p, 2c3m – DaPFOR + TDP – Desulfovibrio africanus
2pda, 2c3o, 2c42 - DaPFOR + pyruvate + TDP
1kek, 2c3y, 2uza - DaPFOR + CO2 + acetyl-TDP
2c3p - DaPFOR + TDP derivative
2c3u - DaPFOR + pyruvate + TDP derivative
7plm – DaPFOR + TPP – Cryo EM
2raa - PFOR γ subunit - Thermotoga maritima
6cin – MtPFOR + TDP – Moorella thermoacetica
6cio, 6cip – MtPFOR + TTP derivative
6ciq – MtPFOR + TTP + CoA
References
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